Theorem ltaprg 7686

Description: Ordering property of addition. Proposition 9-3.5(v) of [Gleason] p. 123. (Contributed by Jim Kingdon, 26-Dec-2019.)

Assertion

Ref	Expression
ltaprg	|- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( A <P B <-> ( C +P. A ) <P ( C +P. B ) ) )

Proof of Theorem ltaprg

Dummy variable x is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ltaprlem 7685	. . 3 |- ( C e. P. -> ( A <P B -> ( C +P. A ) <P ( C +P. B ) ) )
2	1	3ad2ant3 1022	. 2 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( A <P B -> ( C +P. A ) <P ( C +P. B ) ) )
3		ltexpri 7680	. . . . 5 |- ( ( C +P. A ) <P ( C +P. B ) -> E. x e. P. ( ( C +P. A ) +P. x ) = ( C +P. B ) )
4	3	adantl 277	. . . 4 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( C +P. A ) <P ( C +P. B ) ) -> E. x e. P. ( ( C +P. A ) +P. x ) = ( C +P. B ) )
5		simpl1 1002	. . . . . . 7 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> A e. P. )
6		simprl 529	. . . . . . 7 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> x e. P. )
7		ltaddpr 7664	. . . . . . 7 |- ( ( A e. P. /\ x e. P. ) -> A <P ( A +P. x ) )
8	5, 6, 7	syl2anc 411	. . . . . 6 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> A <P ( A +P. x ) )
9		addassprg 7646	. . . . . . . . . . . 12 |- ( ( C e. P. /\ A e. P. /\ x e. P. ) -> ( ( C +P. A ) +P. x ) = ( C +P. ( A +P. x ) ) )
10	9	3com12 1209	. . . . . . . . . . 11 |- ( ( A e. P. /\ C e. P. /\ x e. P. ) -> ( ( C +P. A ) +P. x ) = ( C +P. ( A +P. x ) ) )
11	10	3expa 1205	. . . . . . . . . 10 |- ( ( ( A e. P. /\ C e. P. ) /\ x e. P. ) -> ( ( C +P. A ) +P. x ) = ( C +P. ( A +P. x ) ) )
12	11	adantrr 479	. . . . . . . . 9 |- ( ( ( A e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( ( C +P. A ) +P. x ) = ( C +P. ( A +P. x ) ) )
13		simprr 531	. . . . . . . . 9 |- ( ( ( A e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( ( C +P. A ) +P. x ) = ( C +P. B ) )
14	12, 13	eqtr3d 2231	. . . . . . . 8 |- ( ( ( A e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( C +P. ( A +P. x ) ) = ( C +P. B ) )
15	14	3adantl2 1156	. . . . . . 7 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( C +P. ( A +P. x ) ) = ( C +P. B ) )
16		simpl3 1004	. . . . . . . 8 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> C e. P. )
17		addclpr 7604	. . . . . . . . 9 |- ( ( A e. P. /\ x e. P. ) -> ( A +P. x ) e. P. )
18	5, 6, 17	syl2anc 411	. . . . . . . 8 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( A +P. x ) e. P. )
19		simpl2 1003	. . . . . . . 8 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> B e. P. )
20		addcanprg 7683	. . . . . . . 8 |- ( ( C e. P. /\ ( A +P. x ) e. P. /\ B e. P. ) -> ( ( C +P. ( A +P. x ) ) = ( C +P. B ) -> ( A +P. x ) = B ) )
21	16, 18, 19, 20	syl3anc 1249	. . . . . . 7 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( ( C +P. ( A +P. x ) ) = ( C +P. B ) -> ( A +P. x ) = B ) )
22	15, 21	mpd 13	. . . . . 6 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> ( A +P. x ) = B )
23	8, 22	breqtrd 4059	. . . . 5 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> A <P B )
24	23	adantlr 477	. . . 4 |- ( ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( C +P. A ) <P ( C +P. B ) ) /\ ( x e. P. /\ ( ( C +P. A ) +P. x ) = ( C +P. B ) ) ) -> A <P B )
25	4, 24	rexlimddv 2619	. . 3 |- ( ( ( A e. P. /\ B e. P. /\ C e. P. ) /\ ( C +P. A ) <P ( C +P. B ) ) -> A <P B )
26	25	ex 115	. 2 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( ( C +P. A ) <P ( C +P. B ) -> A <P B ) )
27	2, 26	impbid 129	1 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( A <P B <-> ( C +P. A ) <P ( C +P. B ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 980   = wceq 1364   e. wcel 2167   E.wrex 2476   class class class wbr 4033  (class class class)co 5922   P.cnp 7358   +P. cpp 7360   <P cltp 7362

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4148  ax-sep 4151  ax-nul 4159  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-iinf 4624

This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3451  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-tr 4132  df-eprel 4324  df-id 4328  df-po 4331  df-iso 4332  df-iord 4401  df-on 4403  df-suc 4406  df-iom 4627  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-ov 5925  df-oprab 5926  df-mpo 5927  df-1st 6198  df-2nd 6199  df-recs 6363  df-irdg 6428  df-1o 6474  df-2o 6475  df-oadd 6478  df-omul 6479  df-er 6592  df-ec 6594  df-qs 6598  df-ni 7371  df-pli 7372  df-mi 7373  df-lti 7374  df-plpq 7411  df-mpq 7412  df-enq 7414  df-nqqs 7415  df-plqqs 7416  df-mqqs 7417  df-1nqqs 7418  df-rq 7419  df-ltnqqs 7420  df-enq0 7491  df-nq0 7492  df-0nq0 7493  df-plq0 7494  df-mq0 7495  df-inp 7533  df-iplp 7535  df-iltp 7537

This theorem is referenced by:  prplnqu  7687  addextpr  7688  caucvgprlemcanl  7711  caucvgprprlemnkltj  7756  caucvgprprlemnbj  7760  caucvgprprlemmu  7762  caucvgprprlemloc  7770  caucvgprprlemexbt  7773  caucvgprprlemexb  7774  caucvgprprlemaddq  7775  caucvgprprlem1  7776  caucvgprprlem2  7777  ltsrprg  7814  gt0srpr  7815  lttrsr  7829  ltsosr  7831  ltasrg  7837  prsrlt  7854  ltpsrprg  7870  map2psrprg  7872